Synthetic Monitoring
Scheduled Lighthouse audits that catch slowdowns before your users or Google do
Synthetic monitoring runs automated Lighthouse audits from controlled environments on a schedule you define. Get consistent, reproducible measurements that aren't skewed by varying devices and network speeds. Perfect for catching performance regressions after deployments – before they impact real users.
- Automated Lighthouse Audits
- Multiple Test Locations
- Consistent Baselines
- All Performance Metrics
A deployment went out, and now everything is slow
By the time users complain, the damage is done. Synthetic monitoring catches regressions right after they ship – before your visitors or Google notice.
Performance regressions slip into production undetected
You only find out about slowdowns when users complain or rankings drop
RUM data takes time to accumulate – you need faster feedback
Manual Lighthouse tests are inconsistent and time-consuming
Different team members get different results depending on their setup
You can't reliably compare before and after a change
Automated Lighthouse audits on a schedule you set
Track performance metrics, Lighthouse scores, and page load filmstrips over time. See exactly how your site performs in controlled conditions.
Automated Lighthouse Audits
Schedule full Lighthouse audits to run automatically. Performance, Accessibility, SEO, and Best Practices scores – all tracked over time without manual effort.
Multiple Test Locations
Tests run from Google's servers by default, with additional monitoring locations available on higher plans. See how distance and network conditions affect your visitors, and catch region-specific CDN issues.
Consistent Baselines
Every test runs in the same controlled environment. No more "works on my machine" – get reproducible results you can trust for before/after comparisons.
All Performance Metrics
Track FCP, LCP, TBT, CLS, Speed Index, and Time to Interactive. See exactly which metrics improved or degraded after each change you make.
Performance Alerts
Get notified when key metrics like LCP or CLS exceed thresholds. Know about issues shortly after a deployment, not days later.
Historical Trends
Track how your performance scores change over time. See your Lighthouse audit history for your plan's full retention window to understand trends and validate improvements.
Screenshot Filmstrips
Visual filmstrips show how your page renders as it loads. Identify visual bottlenecks like late-loading hero images or layout shifts.
Opportunity Detection
Get Lighthouse's optimization recommendations automatically. Prioritize fixes by their estimated savings in milliseconds and kilobytes.
Network Waterfall Analysis
See exactly how your page loads with detailed request timelines. Identify slow resources, render-blocking scripts, and optimization opportunities.
Every Lighthouse category, scored on schedule
Automated audits capture Performance, Accessibility, SEO, and Best Practices on every run. Consistent, reproducible scores from a controlled environment you can trust.
- Performance, Accessibility, SEO, and Best Practices
- The same controlled environment on every run
- Reproducible scores for before/after comparisons
Performance scored on every scheduled run, alongside the other Lighthouse categories.
Watch the score drop after a deploy
Track how your performance score changes over time. Scheduled runs make a post-deployment regression obvious, so you can roll it back or fix it before users notice.
- Audit history for your plan's full retention window
- Spot regressions right after they ship
- Runs from hourly to daily on your schedule
All the lab metrics that matter
See FCP, LCP, TBT, CLS, Speed Index, and Time to Interactive for every audit. When a score drops, you can tell at a glance which metric caused it.
- Core Web Vitals plus lab-only timings
- See which metric moved after each change
- Alerts when LCP or CLS cross thresholds
Automated testing, actionable insights
Add pages to monitor
Specify the pages you want to test regularly. Focus on critical pages like homepage, product pages, checkout, and landing pages.
Choose test frequency and locations
Set how often to run tests (from hourly to daily, depending on your plan) and, where your plan allows, which additional locations to test from. More frequent tests mean faster regression detection.
Automatic testing begins
VitalSentinel runs Lighthouse audits on your schedule. Results are stored and compared against previous runs automatically.
Get alerted on regressions
When a metric crosses your threshold, VitalSentinel notifies you in-app and by email. See exactly what changed and when it happened.
Real scenarios, real fixes
"A third-party script update tanked performance, but you didn't notice until users complained."
Regular synthetic tests running every few hours would have caught the regression quickly, letting you roll it back or fix it before widespread impact.
"Performance testing is manual and inconsistent. Results vary depending on who runs the test and when."
Automated synthetic monitoring provides consistent baselines for every deployment, making performance part of your QA process.
"You need to prove that performance SLAs are being met, but you only have sporadic manual tests."
Scheduled synthetic tests provide continuous evidence of performance levels, with historical data for SLA reporting.
Every module included. You only choose your coverage
All plans include all eight modules. Start free, upgrade only when you need wider coverage.
Free
Perfect for trying out VitalSentinel
- 1 domain
- 25K RUM page views/mo
- 100K analytics events/mo
- 6 months data retention
Lite
For consultants and growing businesses
- 5 domains
- 250K RUM page views/mo
- 5M analytics events/mo
- 16 months data retention
Catch regressions before users do
Set up automated Lighthouse testing in minutes. Know about performance issues before they impact real users.